Encasement for a handheld computer

ABSTRACT

An encasement for a handheld computer is provided. The encasement includes a spine that is slideably engageable with an accessory slot of a handheld computer; and an encasement portion joined to the spine. The encasement portion is dimensioned to encase the handheld computer when the spine is engaged to the handheld computer.

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation-in-part of application Ser.No. 09/451,630, filed Nov. 30, 1999, entitled “Cover For A HandheldComputer” (Attorney Docket No. 15886-354); application Ser. No.09/271,057, filed Mar. 16, 1999, entitled “Dual Action Stylus For AHandheld Computer,” (Attorney Docket No. 15886-340); application Ser.No. 09/244,440, filed Feb. 4, 1999, entitled “Handheld Computer”(Attorney Docket No. 15886-204); application Ser. No. 09/246,781, filedFeb. 4, 1999, entitled “Handheld Computer” (Attorney Docket No.15886-206); and application Ser. No. 09/244,613, filed Feb. 4, 1999,entitled “Handheld Computer” (Attorney Docket No. 15886-207); all ofwhich are hereby incorporated by reference for this application.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] This invention relates to the field of handheld computers. Inparticular, the invention relates to a cover for a handheld computer.

[0004] 2. Description of the Related Art

[0005] Handheld computers, including personal digital assistants andpalm-sized computers, provide the user with a wide variety of functions,such as a calendar, an address book, a task list, a notepad, and acalculator. These handheld computers may be approximately the size of astack of 3″×5″ index cards, sufficiently compact to fit into a shirtpocket.

[0006] Current handheld computers, such as the PalmPilot™ from 3ComCorporation, typically have a housing, which consists of a mating frontshell and back shell, which are coupled to each other with screws. Thefront shell and back shell enclose the components of the handheldcomputer. Typically, a main board is mounted on one of the shells.

[0007] The housing or casing of the handheld computer typically includesa slot for a retaining a stylus or writing device.

[0008] Handheld computers also typically include a display and one ormore application buttons on a front surface. The display may be atouch-screen to accept entry from a stylus or pointer device.

[0009] In between uses, handheld computers can be housed in anencasement to protect the device as it is carried between locations. Theencasements need to be stored or accounted for separately when thehandheld computer is in use, or stored away from the encasement. Also,the handheld computer may beed to be guarded from being dropped when theencasement is opened or separated from the handheld computer.

SUMMARY OF THE INVENTION

[0010] An embodiment of the invention includes an encasement for ahandheld computer. The encasement includes a spine that engages anaccessory slot of the handheld computer. The encasement may be securedto the handheld computer by inserting the spine into the accessory slotof the handheld computer. The encasement portion may be formed fromdifferent types of material, including flexible and rigid materials.

BRIEF DESCRIPTION OF THE FIGURES

[0011] FIGS. 1A-1D illustrate a handheld computer, under an embodimentof the invention.

[0012]FIG. 1A is a frontal view of the handheld computer.

[0013]FIG. 1B is an exploded isometric view showing components of thehandheld computer, under an embodiment of the invention.

[0014]FIG. 1C is a top view of the handheld computer illustrating ahousing of the handheld computer, under an embodiment of the invention.

[0015]FIG. 1D is a side view of the handheld computer illustrating thehousing and an accessorial slot under an embodiment of the invention.

[0016] FIGS. 2A-C illustrates a cover, under an embodiment of theinvention.

[0017]FIG. 2A is a frontal view of a first surface of the cover.

[0018]FIG. 2B is a frontal view of a second surface of the cover.

[0019]FIG. 2C is an isometric view of the cover coupled to the handheldcomputer.

[0020]FIGS. 3A and 3B illustrate a top view of the handheld computercoupled to the cover, under an embodiment of the invention.

[0021]FIG. 3A shows the cover positioned adjacent a front surface of thehandheld computer.

[0022]FIG. 3B shows the cover positioned adjacent a back surface of thehandheld computer.

[0023]FIG. 4 is a frontal view of a cover, under another embodiment ofthe invention.

[0024]FIG. 5 is a frontal view of a cover, under still anotherembodiment of the invention.

[0025]FIG. 6 is a side-view of a handheld computer for an alternativecover configuration, under another embodiment of the invention.

[0026] FIGS. 7A-7B illustrate an encasement, under an embodiment of theinvention.

[0027]FIG. 7A is a frontal view of the encasement in the open position,with a separated spine.

[0028]FIG. 7B is a side view of the encasement in the closed position.

[0029]FIG. 8 illustrates an encasement with an integrated spine, underan embodiment of the invention.

[0030] FIGS. 9A-9B illustrate mechanical couplings for encasements,under an embodiment of the invention.

[0031]FIG. 9A illustrates a first mechanical coupling for securing anencasement in the closed position, under an embodiment of the invention.

[0032]FIG. 9B illustrates a second mechanical coupling for securing anencasement in the closed position, under an embodiment of the invention.

[0033] FIGS. 10A-10D illustrate an encasement having a hard-shellexterior, under an embodiment of the invention.

[0034]FIG. 10A illustrates a frontal view of the hard-shell encasementin the open position.

[0035]FIG. 10B illustrates a rear view of the hard-shell encasement inthe open position.

[0036]FIG. 10C is an isometric view of the hard-shell encasement, shownretaining a handheld computer in phantom.

[0037]FIG. 10D is an isometric view of the encasement in a partiallyopen position.

[0038] FIGS. 11A-11B illustrate the encasement formed fromwater-resistant material, under an embodiment of the invention.

[0039]FIG. 11A illustrates the water-resistant encasement in the openposition.

[0040]FIG. 11B illustrates the water-resistant encasement in the openposition.

[0041] FIGS. 12A-12F illustrates another embodiment of a hard-shellencasement, under and embodiment of the invention.

[0042]FIG. 12A is a front view of hard-shell encasement in a closedposition.

[0043]FIG. 12B is a top view of the hard-shell encasement in the closedposition.

[0044]FIG. 12C is a bottom view of the hard-shell encasement.

[0045]FIG. 12D is a side-view of the hard-shell encasement in the closedposition.

[0046]FIG. 12E is a front view of the hard-shell encasement in the openposition.

[0047]FIG. 12F is a side cut-away of the hard-shell encasement,illustrating a spine and a joint for the encasement under an embodimentof the invention.

DETAILED DESCRIPTION

[0048] Embodiments of the invention include an encasement for a handheldcomputer. A portion of the encasement slideably engages a slot on thehandheld computer to removeably attach the encasement to the handheldcomputer. When attached, an encasement portion can enclose the handheldcomputer. The encasement may be formed from flexible, rigid, orwater-resistant material.

[0049] A. System Overview

[0050]FIG. 1A is an exploded view of a handheld computer 100 under anembodiment of the invention. A typical handheld computer is used tomaintain calendars, to-do lists, contacts and memos. Examples ofhandheld computers for use with embodiments of this invention includeany one of the PalmPilot™, Palm III™, Palm V™, and Palm VII™ organizers,manufactured by the 3Com Corporation. Other embodiments of the inventioncan include Windows CE™ portable computers, or other handheld computersand personal digital assistants.

[0051] The handheld computer 100 includes a housing 110 having a top end107, a bottom end 109, and lateral sides 117, 119. A user-interactivedisplay 120 is provided on a front side 106 of the handheld computer100. A plurality of application buttons 130 are accessible through thehousing 110 at a portion below the display 120. The housing 100 includesa rectangular shape with a flaired bottom portion 122.

[0052] The handheld computer 100 includes one or more accessorial slots.Each accessorial slot is adapted to receive an accessory device. In anembodiment, a first and second accessorial slot 112, 114 (FIG. 11B) areprovided on each lateral side 117, 119 of the housing 110. Eachaccessorial slot 112, 114 may be formed into the midframe 115 (FIG. 1B).Preferably, the accessorial slots 112, 114 are elongated and cylindricalto receive a stylus 140 (FIG. 1B). Each of the accessorial slots 112,114 may retain stylus 140 for intermittent use with the handheldcomputer 100. As will be further described, one of the accessorial slots112, 114 is also used under an embodiment to receive and retain aperipheral portion of the cover 200 (FIG. 2A).

[0053]FIG. 1B is an exploded isometric view of the handheld computer100. The housing 110 includes a midframe 115 sandwiched between a frontshell 113 and a back shell 116. The front shell 113, back shell 116, andone or more surfaces of midframe 115 combine to form a periphery ofhandheld computer 100. Midframe 115 may be molded or otherwise formed tomatch dimensions of front shell 113 and back shell 116. Midframe 115 maybe partially enclosed by one or both of front shell 114 and back shell116. The front shell 113, back shell 116 and midframe 115 combine toenclose and protect the internal components of the handheld computer100. Midframe 115, front shell 113, and back shell 116 are coupledtogether using one or a combination of screws, hinges, clips, othersuitable fasteners, and adhesives.

[0054] The housing 110 retains componentry of the handheld computer 100.The componentry includes a main board 150, battery 151, a flexiblecircuit 152, and an electrostatic discharge device 154. Display 120 maybe separated from housing 110 by one or more gaskets 121. Gaskets 121absorb shock and allow a close fit between housing 110 and display 120.If display 120 is a touch-sensitive display, gaskets 121 also act as aspacer to prevent housing 110 from inadvertently activating thetouch-sensitive display.

[0055]FIG. 1C illustrates a top view of the handheld computer 100.Housing 110 includes a top surface 135 having openings to theaccessorial slots 112, 114. The accessorial slots 112, 114 arepositioned adjacent a periphery of the housing, and preferably at theleft and right lateral sides 117, 119. Each accessorial slot 112, 114includes an open segment 141, 143 formed into the housing 110 thatextends the length of the respective accessorial slot. Each open segment141, 143 is a void formed in the housing along an arclength portion of aperiphery for the respective accessorial slot 112, 114. Each opensegment 141, 143 also extends lengthwise along the respectiveaccessorial slot 112, 114 from the top end 107 to the bottom end 109 ofthe handheld computer. Therefore, the open segments 141, 143 of therespective accessorial slots 112, 114 access a length-wise surface of anaccessorial device retained in the respective accessorial slot.Structures may be extended from or attached to the device inserted intoone of the accessorial slots 112, 114 along the length accessiblethrough the corresponding open segment 141, 143.

[0056] In this manner, accessorial slots 112, 114 allow for accessorydevices such as covers 200 (FIG. 2A) to include a peripheral portionthat slideably engages and couples to handheld computer 100 so as toretain structures such as a cover panel 204 (FIG. 2A).

[0057] Cover panels can extend from the peripheral portions to coversurfaces on the handheld computer 100, including the display 120 and theapplication buttons 130. Further, the use of two or more accessorialslots 112, 114 enables the handheld computer 100 to retain an accessorydevice such as the cover 200 simultaneously with stylus 140.

[0058]FIG. 1D is a length-wise view of one of the accessorial slot 112,114 on the respective lateral side of the handheld computer 100.Accessorial slot 112 extends from an opening on the top surface 135 tothe bottom portion 122. The accessorial slot 112 is preferably formedinto the midframe 115 and includes a narrowing structure 128 positionedwithin or near the bottom portion 122. The narrowing structure 128receives a tapered section of the device being inserted, which mayinclude the stylus 140, the cover 200, or another accessory device. Theopen segment 141 extend the length of the accessorial slot 112.

[0059]FIG. 2A is a frontal view of a cover 200, under an embodiment ofthe invention. The cover 200 includes a peripheral portion thatslideably engages an opening, slot or rail of the handheld computer 100.In an embodiment such as shown by FIGS 1A-1D, the cover 200 is slideablycoupled to either one of the accessorial slots 112, 114. The cover 200includes a cover face 204 that extends from the peripheral portion. Thecover face 204 protects features of the handheld computer 100 when theperipheral portion is engaged with the opening of the handheld computer100.

[0060] In an embodiment, peripheral portion of cover 200 includes aspine 202. The cover face 204 extends from the spine 202 so as to covera surface on the handheld computer 100. A flex member 206 connects spine102 to cover face 204. The cover face 204 is moveable about an axis ofthe spine 202 so as to move between a position adjacent the frontsurface 106 and a back surface 108 of the handheld computer 200.

[0061] Spine 202 is dimensioned to be received and retained by a slot oropening in the housing 110 of the handheld computer 100. Preferably,spine 202 is an elongate member having length and cross-section to bereceived and retained by one of the accessorial slots 112, 114. Spine202 includes a cylindrical cross-section having a top end 212 and abottom end 214. A tapered segment 226 is adjacent bottom end 214. Thespine 202 is inserted into one of the accessorial slots 112, 114 withthe bottom end 214 first.

[0062] The tapered segment 226 of spine 202 combines with the narrowingstructure 128 (FIG. 1D) of the accessorial slots 112, 114 to facilitateretention of spine 202. A protrusion 215 extends from spine 202 near topend 212. The protrusion 215 is exposed when spine 202 is inserted intothe slot of the handheld computer 100 so as to enable the spine 202 tobe directed out of the accessorial slot 112, 114 from the top end 212.Movement of spine 202 traverses a single longitudinal axis of theaccessorial slots 112, 114 to attach the cover to and detach the coverfrom the handheld computer 100.

[0063] In an embodiment, spine 202 is rotationally fixed when insertedinto one of the accessorial slots 112, 114. The cross-section of spine202 may be dimensioned so that rotational movement of the spine isprecluded within either one of the accessorial slot 112, 114. In anotherembodiment, spine 202 is rotationally moveable within the accessorialslot 112, 114. The rotation of the spine 202 may be limited to thearclength portion of the open segment 141, 143 for the accessorial slot212, 214 receiving the spine 202.

[0064] Preferably, the spine 202 is dimensioned and contoured to beinterchangeable with the stylus 140. An endpoint 227 tapered segment 226may be structured to double as a stylus to enter input into the display120. A stylus point may be included on the spine 202 to provide acontact with display 120 (FIG. 1A).

[0065] Flex member 206 includes a first end surface 216 extending fromthe spine 202 and a second end surface 218 that is attached to the coverpanel 204. In an embodiment, flex member 206 extends from a length ofspine 202 that is accessible through the open segment 141, 143 of therespective accessorial slots 112, 114.

[0066] Flex member 206 includes flexure properties to enable the firstend surface 216 to be moved about the second end surface 218. Inaddition, a distance between first end surface 216 and second endsurface 218 may provide a slack length to further enable movement of thesecond end surface 218 about the first end surface 216. Preferably, flexmember 206 is formed from a plurality of segments 222 that combine toenable the first and second end surfaces 216, 218 to move about oneanother. The slack length and flexure properties of flex member 206combine to permit arcuate or radial movement of either the first orsecond end surface 216, 218 about the other end surface.

[0067] The cover panel 204 includes a first face 233 and a second face235 (FIG. 2B). Preferably, cover panel 204 is dimensioned to cover adimension including the display 120 (FIG. 1A) and the applicationbuttons 130. In this way, cover panel 204 prevents inadvertent entryinto the handheld computer 100 through either the display 120 or theapplication buttons 130. Further, components and displays of thehandheld computer 200 are protected from dust, dirt, scratching, orcontact.

[0068]FIG. 2B shows the second face 235 of the cover panel 204. In oneembodiment, the second face 235 includes a pocket 255 to retainrelatively flat items such as business cards or credit cards. The pocket255 of the cover panel 204 is preferably formed from clear plasticportion 256 that is stitched to the second surface. Alternatively, thepocket 255 may be a unitary feature of the cover panel 204. The pocket255 may also be joined to the second face 235 with Velcro or otherdetachable coupling mechanisms.

[0069] In another embodiment, the second face 235 of the cover panel 204mirrors the first face 233. This enables cover panel 204 to beinsertable into either the accessorial sots 112, 114, with theappearance of the cover panel 204 being the same in either position.

[0070]FIG. 2C illustrates the cover 200 in a position where cover face204 is adjacent the front surface 116 of the handheld computer 100. Thecover 200 is engaged with one of the accessorial slots 112 (not shown inthis figure), and the stylus 140 is engaged with the other accessorialslot 114. In an embodiment, the cover face 204 is dimensioned so as tomatch almost the dimensions and contours of the front surface 106. Abottom region of the handheld computer 100 may be uncovered so as tofacilitate removal of the cover face 204 from adjacent the front surface116. The enables the cover 200 to be carried with the spine 202 with thefeel of being substantially one unit.

[0071]FIG. 3A is a top end view showing cover 200 slideably engaged withthe handheld computer 100. Spine 202 is inserted into accessorial slots112 positioned at lateral sides 117 of the housing 110. Housing 110includes the front surface 116 including display 120 (FIG. 1A) andapplications buttons 130 (FIG. 1B), and a back surface 108.

[0072] In an embodiment, a portion of spine 202 is accessible throughthe open length 141 of accessorial slot 112. The flex member 206 isjoined to a portion of spine 202 accessible through accessorial slot112. When inserted, spine 202 is oriented relative to the accessorialslot 112 so that flex member 206 extends out of open length 141 inhousing 110. Cover panel 204 is extended from the second end surface 218of the flex member 206 so as to cover a lateral dimension of thehandheld computer 100. When positioned adjacent the front surface 116 ofthe handheld computer 100, the first face 233 is exposed and the secondface 235 is positioned interior and immediately adjacent to the frontsurface 116 of the handheld computer 100. The slack length of the flexmember 206 enables the cover panel 204 to move parallel with respect tothe first surface of the cover 200.

[0073] In addition, slack length and flexure properties of flex member206 enable the cover panel 204 to be moveable about an axis of the spine202. FIG. 3B illustrates flex member 206 as being moveable betweenpositions adjacent either the front surface 116 or a back surface 108 ofthe handheld computer 100. Flex member 206 may be extended away from thefront or back surface 106, 108 of the handheld computer 100 so thatcover panel 204 and flex member 206 are fully extended.

[0074] The cover panel 204 may be flipped to be adjacent the back side108 of the housing 100. In an embodiment, spine 202 remains fixed in theaccessorial slot 112, 114, while the slack length of the flex member 206enables cover panel 204 to be flipped to be adjacent the back surface108 of the handheld computer 100. When adjacent the back surface 126,the second face 235 of the cover panel is exterior and the first face233 is interior. In one embodiment, the cover panel 204 may be flippedto be adjacent the back surface 108 so as to expose the pocket 255 thatincludes business cards or credit cards.

[0075] In another embodiment, both faces 233, 235 of cover face 204 aresuited to be exterior or otherwise distal to the front surface 106 (orback surface 108) of the handheld computer 100. Thus, in thisembodiment, second face 235 may not include pocket 255. Both first andsecond surface 233 and 235 may be smooth, or mirrored in appearance todisplay the same features in the same orientation, or symmetrical to oneanother. Spine 202 may then be inserted into either left or rightaccessorial slot 112, 114, at the choosing of a user of the handheldcomputer 100. For example, when inserted into the left accessorial slot112, the surface 233 of the cover face 206 extends over the frontsurface 106. When inserted into the second accessorial slot 114, thesurface 235 of the cover face 206 extends over the front surface 106. Ineither case, the appearance of the cover face 204 is the same to theuser.

[0076] In this embodiment, the length of the flex member 206 issufficient to extend either one of the faces 233, 235 of the cover face204 over the front side 106 (or the back side 108) of the handheldcomputer 100, depending on whether the spine is inserted into the firstor second accessorial slot 112, 114.

[0077] In another embodiment, spine 202 is shaped to be received by atleast one of the accessorial slots 112, 114 via top end 212 or bottomend 214 first. This allows spine 202 to be inserted into first andsecond accessorial slot 112, 114 so as to extend the same face 233, 235of the cover face 204 over the front surface 106 (or back surface 108)of the handheld computer 100.

[0078] B. Materials, Manufacturing of Cover Panel

[0079] In an embodiment, spine 202 is rigid. Preferably, spine 202 isformed from a combination of rubber and plastic. In a specificembodiment, spine 202 is formed from plastic molded with rubber in adouble-shot manufacturing process. Spine 202 may be provided with aplastic shell filled with rubber/plastic material, formed either in thesame or subsequent manufacturing steps.

[0080] In other embodiments, spine 202 is formed from rigid materialssuch as metals, including steel, brass, tin, or aluminum. The flexmember 206 may be attached to the spine 202 through adhesives. Spine 202may also be attached through other means, such as by passing spine 202through a closed-loop portion of flex member 206.

[0081] In an embodiment, flex member 206 is formed from the samematerial as spine 202. Preferably, flex member 206 is also formed duringthe same manufacturing process as spine 202. Flex member 206 may beformed from the same double-shot manufacturing process in which plasticis molded with rubber to form the structure including the spine 202 andthe flex member 206. Thus, flex member 206 may be unitarily constructedwith spine 202. The segments 222 of the flex member 206 may be rigid,but in combination provide flexure between the first and second endsurfaces 216, 218 of the flex member 206. Alternatively, spine 202 maybe attached or otherwise integrated to spine 202.

[0082] In an embodiment, cover panel 204 is formed from deformablematerials. In an application, the cover panel 204 is formed fromleather, or leather material, such as rawhide, soft leather, and suede.The cover panel 204 may alternatively be formed from fabric, vinyl,plastic, or rubber. Fabric includes cloth, velvet, tweed, and polyester.Examples of materials listed herein are intended to be exemplary, andnot limiting. The cover panel 204 may also be formed from a combinationof two or more materials, such as leather and plastic.

[0083] The cover panel 204 is preferably stitched to the flex member206. Alternatively, cover panel 204 is glued or secured through othercoupling means to the flex member 206.

[0084] C. Alternative Embodiments for Cover of Handheld Computer

[0085]FIG. 4 illustrates a cover 300 under an embodiment of theinvention. The cover 300 includes a spine 302 and a cover panel 304. Thecover panel 304 is connected to the spine 202. The spine 302 may beslideably coupled to a handheld computer. In an embodiment such as shownby FIGS 1A-1D, the spine 302 slideably inserts into either accessorialslot 112, 114. The spine 302 is rotatable when inserted in theaccessorial slot 112, 114 so that the cover panel 304 is rotationalabout an axis of the accessorial slot 112, 114.

[0086] In this embodiment, spine 302 may be formed from rigid materialssuch as plastic, rubber, plastic molded with rubber, steel, aluminum,and brass. Cover panel 304 may be formed from deformable materials suchas leather, plastic, vinyl, rubber, or fabric.

[0087] The spine 302 may be attached to cover panel 302 by looping anend surface 307 at two or more locations to form a seam. Adhesives, orother coupling means such as stitches may be used to loop the endsurface 307 of the cover 300. The spine 302 may be inserted through theseam to attach to the cover pane 304.

[0088]FIG. 5 illustrates the cover 200 under an embodiment in which theflex member 206′ is relatively short in comparison to a length of spine202′. Preferably, flex member 206′ is positioned near or adjacent to topend 212′ of spine 202′. This enables cover 200′ to be inserted into oneof the accessorial slots 112′, 114′ having short open lengths to accessthe flex member 206′.

[0089]FIG. 6 illustrates handheld computer 100′ having accessorial slot112′ with shortened open segments. Preferably, the accessorial slots112′ are positioned at or adjacent to one of the lateral sides of thehandheld computer 100′. The open length 141′ forming a portion of theaccessorial slot 112′ is relatively short in comparison to an overalllength of the accessorial slot.

[0090] In another alternative embodiment, the cover 200 may include twoelongate members coupled to two opposite edges of a cover panel. Bothelongate members fit simultaneously into both accessory slots and holdcover panel 504 across the front of handheld computer 100.

[0091] In another alternative embodiment, cover panel 204 is formed fromrigid materials such as used to form the spine 202. The cover panel 204may, with flex member 206 and spine 202, be formed from a double-shotmolding process combining rubber with a plastic shell. The cover panel204 may be formed in the same manufacturing step as spine 202.

[0092] Alternatively, cover panel 204 may be formed from metals such assteel, aluminum, tin or brass. In these embodiments, cover panel 204 maybe unitarily constructed with spine 202. Cover panel 204 may also beattached to spine 202 through flex member 206. The flex member 206 canbe joined to spine 202 and cover panel 204 through mechanical couplingmechanisms.

[0093] D. Encasement for Handheld Computer

[0094] An embodiment of the invention includes an encasement thatsecures to and encases handheld computer 100. The encasement includes astructure that slideably engages the accessorial slot 112 of handheldcomputer 100. The encasement can be adapted to incorporatecharacteristics, features, and functions that protect handheld computer100, as well as providing additional carriage or organizational uses.

[0095] As used herein, encasement refers to an enclosure that containshandheld computer within another structure so that a front and backsurface of the handheld computer are covered. One or more lateral sidesof the handheld computer may be exposed in an encasement. In addition,an encasement may include openings that access features or surfaces ofthe handheld computer 100.

[0096]FIG. 7A illustrate an interior of an encasement assembly 700 forhandheld computer 100, under an embodiment of the invention. Theencasement assembly 700 includes an encasement portion 750, referencedby a first segment 710 and a second segment 720. The first segment 710and second segment 720 are moveable about a center axis Z of encasementportion 750.

[0097] A pair of retaining structures 725, 728 are centrally disposed onthe interior surface 705 of encasement portion 750. The retainingstructures 725, 728 are looped openings extending from the interiorsurface of the encasement portion 750. Preferably, retaining structures725, 728 are aligned so that the openings are colinear.

[0098] In an embodiment such as shown by FIG. 7A, a spine 730 isseparable from encasement portion 750. The spine 730 is a cylindricalmember dimensioned to be retained within accessorial slot 112, 114. Theretaining structures 725, 728 are colinearily aligned to retain spine730.

[0099] In an embodiment, encasement assembly 700 is secured to handheldcomputer 100 by inserting spine 730 into retaining structures 720, 725.The spine 730 may then be inserted into accessorial slot 112, 114 ofhandheld computer 100. Portions of retaining structures 725, 728 may beextended out of the open segment 141 of accessorial slot 112 when spine730 is inserted. In this way, encasement assembly 700 may be releasablycoupled to handheld computer 100.

[0100] Further, spine 730 may be moveable about an arc length defined byopen segment 141. Thus, encasement 700 may be moveable via spine 730between a front and back surface of handheld computer 100.

[0101] The encasement assembly 700 encases handheld computer 100 when itis coupled to handheld computer 100. The encasement assembly 700 mayprovide additional retaining structures to retain a stylus of handheldcomputer 100. Alternatively, if handheld computer 100 includes more thanone accessorial slots 112, 114, encasement assembly 700 may be coupledto one accessory also 112, and stylus 140 may be coupled to the otheraccessorial slot 114. Alternatively, the encasement assembly 700 mayalso include two spines 730 to insert into each respective accessorialslot 112, 114.

[0102] In an embodiment, spine 730 is the stylus for the handheldcomputer. The spine 730 may be separated and retained in one of theaccessorial slots 112, 114 until used. When encasement assembly 700 isnecessary, spine 730 may be inserted into retaining structures 725, 728.To provide stylus features, spine 730 may be equipped with a styluspoint for touching the display of handheld computer 100.

[0103] The encasement portion 750 provides an interior surface or volumefor retaining or providing items in addition to handheld computer 100.For example, FIG. 7A illustrates first segment 710 to include pockets718 retaining items such as credit cards, business cards, smart cards,and memory units for handheld computer. The second segment 720 mayinclude additional items such as stationary pad 716, or other items suchas calculators.

[0104]FIG. 7A illustrates the encasement portion 750 in an openposition, with first segment 710 and second segment 720 moved away fromone another about the central axis. FIG. 7B illustrates the encasementstructure 750 in the closed position, with the first segment 710positioned adjacent to the second segment 720. As shown by FIG. 7B,retaining structures 725, 728 (in phantom) may extend away from theinterior surface of the encasement portion 750. This provides retainingstructures 725, 728 with clearance to retain spine 730, and to allowspine 730 to insert in accessorial slot 112 of handheld computer 100. Italso enhances the moveability of the encasement 700 about the spine 730.

[0105]FIG. 8 illustrates another embodiment for an encasement 800. Theencasement 800 includes an encasement portion 850, referenced by a firstsegment 810 and a second segment 820. As with previous embodiments, thefirst segment 810 and the second segment 820 are moveable about acentral axis Z of the encasement portion 850.

[0106] The encasement 800 includes one or more spine segments 830, 835integrated with an interior surface 805 of encasement portion 850. Thespine segments 830, 835 may be secured to an interior surface 805 offirst segment 810, second segment 830, or centrally disposed onencasement portion 850. For example, spine segments 830, 835 may beformed from plastic, integrated with a flap portion (not shown) during amolding process. The flap portion of spine segments 830, 835 may bestitched or otherwise secured to the interior surface 805 of encasementportion 850.

[0107] To insert encasement portion 850, spine segments 830, 835 areinserted into accessorial slot 112. For example, encasement 800 may bealigned with the top surface of handheld computer so that bottom spinesegment 835 engages accessorial slot 112 first, followed by top spinesegment 830. While encasement 800 is shown to include separated spinesegments 830, 835, other embodiments may provide for a single spine(such as shown by FIGS. 7A and 7B) that is integrated with theencasement portion 850.

[0108] With respect to embodiments of FIGS. 7-9, the encasement may beformed from flexible or compliant material. For example, the encasementmay be formed from leather or leather like material, vinyl, fabric, orrubber. The spine may be formed from rigid material, such as plastic ormetal.

[0109]FIGS. 9A and 9B illustrate embodiments illustrating differentmechanism for securing an encasement 900 in a closed position. Theencasement 900 may be similar to embodiments such as described withFIGS. 7A, 7B and 8. The encasement 900 includes first segment 910 andsecond segment 920. The first segment 910 and second segment 920 may besecured together by a mechanical coupling. When secured together, thefirst and second segments 910 and 920 extend over the front and backsurface of handheld computer 100, thereby encasing the handheld computer100.

[0110]FIG. 9A illustrates a zipper mechanism 960 for retaining the firstsegment 910 against the second segment 920. In an embodiment, a malezipper strip is provided on a peripheral edge of either the first orsecond segment 910, 920, and a female zipper element is provided on aperipheral edge of the other segment.

[0111]FIG. 9B illustrates encasement 900 including a clasp mechanism 970for retaining encasement 900 in a closed position. The clasp element 970may include a button element 972 (male element) and button receiver 974(female element). Alternatively, the clasp element may be a Velcro™fastener, with male clasp 972 and female clasp 974. Many other types ofmechanical couplings are contemplated for retaining the encasement 900in the closed position.

[0112] FIGS. 10A-10C illustrates a hard-shell encasement 1000 forretaining handheld computer 100. The encasement 1000 includes anencasement portion 1050 comprising a first segment 1010 and secondsegment 1020. The first segment 1010 and/or second segment 1020 areformed from rigid materials. For example, encasement portion 1050 may beformed from metals such as steel and aluminum, plastic, or titanium.

[0113]FIG. 10A illustrates an interior of the encasement 1000 in an openposition. The first segment 1010 and second segment 1020 may pivot awayfrom each other about a central axis Z. A spine 1030 may be integratedto extend lengthwise between the first and second segment 1010 and 1020.As with previous embodiments, spine 1030 inserts into one of theaccessorial slots 112, 114 of handheld computer 100. Once inserted, aportion of the spine 1030 integrated with encasement portion 1050 mayextend from the accessorial slot 112 through open segment 141, therebysecuring encasement 1000 to handheld computer 100. The first and/orsecond segments 1010, 1020 include mechanical couplings 1052 to securethe encasement 1000 in the closed position. In an embodiment, themechanical coupling is a latch element.

[0114]FIG. 10B illustrates an exterior of the encasement 1000 in theopen position. The encasement includes one or more joints 1062, 1064 toenable the first and second segments 1010, 1020 to rotate between openand closed positions.

[0115]FIG. 10C illustrates the encasement 1000 in the closed position,with handheld computer 100 (shown in phantom) retained therein. In anembodiment, handheld computer 100 is carried within encasement 1000 byinserting spine 1030 into accessorial slot 112. However, the dimensionsof encasement 1000 may permit handheld computer 100 to be retainedwithin encasement portion 1050 without spine 1030 being inserted intoaccessorial slot 112.

[0116] In an embodiment, encasement 1000 includes interiorshock-absorbers or cushion material to protect handheld computer 100from contact with the rigid interior walls. In this way, handheldcomputer 100 may be protected from impact and carried in more harshenvironments, such as for field use.

[0117]FIG. 10D is an isometric view of encasement 1000 in a partiallyopen position. The first segment 1010 may be pivoted away from thesecond segment 1020 in opening the encasement 1000.

[0118]FIG. 11A illustrates an encasement 100 in an open position, underanother embodiment of the invention. The encasement 1100 includesencasement portion 1150. The encasement portion 1150 includes a firstencasement segment 1110 that is pivotal bout an axis Z with reference toa second encasement segment 1120. The encasement 11000 includes spine,shown by directional arrow 1130. The spine 1130 is inserted intohandheld computer 100 to retain the handheld computer with theencasement 1100. A zipper 1160 secures the first segment against thesecond segment to encase handheld computer 100. FIG. 11B illustrates theencasement 1100 in the closed position.

[0119] In an embodiment, encasement 1100 is formed from water-resistantmaterial. For example, encasement 1150 may be formed from neoprene, orcomparable materials. An interior of encasement 1150 adjacent zipper1160 may be lined with water-resistant material. In the closed position,handheld computer 100 may be sealed from water in the environment, thusbeing protected from rain, puddles or submersion.

[0120] FIGS. 12A-12E illustrate a hard-shell encasement 1200, under anembodiment of the invention. FIG. 12A illustrates a front surface 1212of the encasement 1200. The encasement 1200 includes a joint 1218. Thejoint 1218 allows the front surface to pivot away from a back surface ofthe encasement 1200, in a direction coming out of the paper.

[0121] In an embodiment, the encasement 1200 is formed from acombination of rigid materials. The encasement 1200 may provide on frontsurface 1212 a plastic portion 1205 combined with a metal or metal likeportion 1208. The plastic portion 1205 may be formed during a moldingprocess. In an embodiment, encasement 1200 is formed by combining themetal portion 1208 with a skeleton of molded plastic.

[0122]FIG. 12B is a top view showing a top surface 1222 of theencasement 1200. The surface 1222 includes an opening 1224. In anembodiment, opening 1224 is positioned to allow access to a data port ofthe handheld computer. Preferably, the opening 1224 is positioned toprovide access to a wireless port of the handheld computer 100. Forexample, the opening 1224 is positioned to provide access to aninfra-red port of the handheld computer 100. Thus, handheld computer 100can receive wireless signals from other devices even when housed withinencasement 1200. This provides convenience to users, who can receive,for example, electronically transmitted business cards from otherdevices without having to remove the handheld computer 100 fromencasement 1200.

[0123] The plastic portion 1205 extends to the top surface 1222 and toopening 1224. The joint 1218 is also formed from plastic and isintegrated to the plastic portion on one of the lateral sides ofencasement 1200.

[0124] While FIG. 12B illustrates opening 1224 positioned to providewireless access to a top surface of handheld computer 100, otherembodiments may position the opening 1224 according to the position ofthe data port on another type of handheld computer 100.

[0125]FIG. 12C illustrates a bottom surface 1226 of encasement 1200. Themetal portion 1208 combines with plastic portion 1205 to extend incurved fashion to the bottom surface 1226. The contours of the bottomsurface 1226 matches contours on handheld computer 100.

[0126]FIG. 12D is a side-view of encasement 1200, under an embodiment.The encasement 1200 includes a lateral surface 1242 having a slot 1240.The slot 1240 is positioned to match either open segment 141, 143 ofrespective accessory slot 112, 114. The slot 1240 is dimensioned toallow a stylus to insert and be received by accessory slot 112, 114 whenhandheld computer 100 is retained by encasement 1200.

[0127]FIG. 12E illustrates the encasement in an open position. Theencasement 1200 includes a first segment 1210 and a second segment 1220.The joint 1218 is positioned between the first and second segment. Thejoint 1218 enables either first or second segment 1210 or 1220 to rotateabout a center axis Z.

[0128] In an embodiment, a spine 1260 is positioned towards a middleregion of the encasement 1200, adjacent to joint 1218. The spine 1260may be off-center with respect to central axis Z. The spine 1260 isdimensioned to be received by either accessory slot 112, 114 of handheldcomputer 100.

[0129] As shown by FIGS. 12D and 12E, the spine 1260 of encasement 1200may be inserted into one of the accessory slots 112, 114 of handheldcomputer. When inserted and in the closed position, the slot 1240provides access to the other of the accessory slots 112, 114 of handheldcomputer 100. Thus, access can be provided to a stylus retained in oneof the accessory slots 112, 114 even when handheld computer 100 isretained within the encasement 1200. This is especially advantageouswhen the stylus includes writing features, such as a ball-point tip.

[0130]FIG. 12F is a side cut-away of encasement 1200 in the openposition, showing spine 1260 distended from joint 1218. An extension1262 is provided between joint 1218 and spine 1260 so that spine 1260can extend out of the open segment 141 of accessory slot 112. In anembodiment, spine 1260 and joint 1218 are formed from the same material,preferably integrated plastic.

[0131] Conclusion

[0132] The foregoing description of various embodiments of the inventionhas been presented for purposes of illustration and description. It isnot intended to limit the invention to the precise forms disclosed. Manymodifications and equivalent arrangements will be apparent.

What is claimed is:
 1. An encasement for a handheld computer, theencasement comprising: a spine that is slideably engageable with anaccessory slot of a handheld computer; and an encasement portion joinedto the spine, the encasement portion being dimensioned to encase thehandheld computer when the spine is engaged to the handheld computer. 2.The encasement of claim 1 , wherein the encasement portion is formedfrom flexible material.
 3. The encasement of claim 2 , wherein theencasement portion includes a first segment that extends over a frontsurface of the handheld computer, and a second segment that extends overa back surface of the handheld computer, the first segment and thesecond segment being moveably joined to the spine so as to move betweenan open position and a closed position, the front surface of thehandheld computer being accessible when the first segment and the secondsegment are in the open position, and the front surface of the handheldcomputer being encased when the first segment and the second segment arein the closed position.
 4. The encasement of claim 1 , furthercomprising a mechanical coupling, the mechanical coupling enabling thefirst segment and the second segment to be retained in. the closedposition.
 5. The encasement of claim 4 , wherein the mechanical couplingincludes a female zipper strip that extends a lengthwise segment of oneof the first segment or the second segment, and a male zipper strip thatextends a lengthwise segment of the other of the first segment or thesecond segment.
 6. The encasement of claim 5 , wherein the mechanicalcoupling is a male velcro element positioned on one of the first segmentor the second segment and a female velcro element positioned on theother of the first segment or second segment.
 7. The encasement of claim1 , wherein the encasement portion is formed from a rigid material. 8.The encasement of claim 1 , wherein upon the encasement being engagedwith the handheld computer, a first segment of the encasement extendsover a front surface of the handheld computer, and a second segment ofthe encasement extends over a back surface of the handheld computer, thefirst segment being hinged to the second segment.
 9. The encasement ofclaim of claim 3 , wherein an interior surface of the first segmentand/or the second segment is provided one or more pockets.
 10. Theencasement of claim 3 , wherein an interior surface of the first segmentand/or the second segment is provided a vinyl enclosure havingdimensions for retaining a business card.
 11. The encasement of claim 9, wherein the encasement portion comprises a leather material.
 12. Theencasement of claim 1 , wherein the spine insert into an accessory slotof the handheld computer.
 13. The encasement of claim 12 , wherein thespine is dimensioned to be received by a slot of the handheld computer,the slot being adapted to receive a stylus of the handheld computer. 14.An encasement assembly for a handheld computer, the encasement assemblycomprising: a spine that is slideably insertable into an accessory slotof a handheld computer; and an encasement portion including a middleregion, the middle region containing one or more structures toreleaseably retain the spine, the one or more structures beingconfigured so that the spine is insertable into the accessory slot ofthe handheld computer when the spine is received by the one or morestructures.
 15. The encasement assembly of claim 12 , wherein the spineis formed from a rigid material, and the encasement portion is formedfrom a flexible material.
 16. The encasement assembly of claim 12 ,wherein each of the one or more structures are looped extensions formingan opening, the one or more structures being aligned in the middleregion so that the openings are colinear.
 17. An encasement for ahandheld computer, the encasement comprising: an encasement portiondimensioned so as to be able to encase the handheld computer, theencasement portion comprising a water-resistant material; and a spinepositioned on an interior region of the encasement portion, the spinebeing slideably engageable with an accessory slot of a handheld computerto couple the encasement portion with the handheld computer.
 18. Theencasement of claim 17 , wherein the encasement portion comprises aneoprene material
 19. The encasement of claim 15 , wherein theencasement portion comprises a first segment that encases a front regionof the handheld computer having a display, and a second segment thatencases a back region of the handheld computer, the first segment andthe second segment being moveably joined to the spine so as to movebetween an open position that accesses the handheld computer and aclosed position that encases the handheld computer.
 20. The encasementof claim 16 , further comprising a mechanical coupling that secures thefirst segment to the second segment when the first and second segmentare in the closed position.
 21. The encasement of claim 15 , wherein themechanical coupling includes a female zipper strip that extends alengthwise segment of one of the first segment or the second segment,and a male zipper strip that extends a lengthwise segment of the otherof the first segment or the second segment, wherein a seal formed by themechanical coupling is water resistant.
 22. An encasement for a handheldcomputer, the encasement comprising: an encasement portion dimensionedso as to be able to encase the handheld computer, the encasementincluding an opening aligned to access a wireless port of the handheldcomputer when the handheld computer is contained within the encasement;and a spine positioned on an interior region of the encasement portion,the spine being slideably engageable with an accessory slot of ahandheld computer to couple the encasement portion with the handheldcomputer
 23. The encasement of claim 22 , wherein the opening ispositioned on a surface of the encasement portion that is alignedorthanormally to a front surface or back surface of the handheldcomputer.
 24. The encasement of claim 22 , wherein the encasementportion includes a first segment that covers a front surface of thehandheld computer, and a second segment that covers a back surface ofthe handheld computer, the encasement further comprising a joint thatenables the first segment to rotate with respect to the second segment.25. The encasement of claim 24 , wherein the joint is positionedadjacent to the spine.
 26. An encasement for a handheld computer, theencasement comprising: a spine that is insertable with an accessory slotof a handheld computer; an encasement portion joined to the spine, theencasement portion being dimensioned to encase the handheld computerwhen the spine is engaged to the handheld computer, the encasementportion including a first segment and a second segment that are moveablyjoined to the spine, the first segment and second segment being moveablebetween an open position and a closed position; and a means forretaining the first segment to the second segment of the encasementportion so as to enclose the handheld computer within the encasementwhen the spine is inserted into the accessory slot of the handheldcomputer.